The IUPAC name of CH3-(CH2)18-CH3 is ________.
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Correct answer: A
Explanation
The correct answer is option 1 i.e. Eicosane.
The given molecular formula, CH3-(CH2)18-CH3, represents a saturated hydrocarbon chain consisting of 20 carbon atoms and 42 hydrogen atoms. Such alkanes are named based on the number of carbon atoms, with the suffix '-ane' indicating single bonds only. Since this molecule has 20 carbon atoms, its IUPAC name is eicosane (from the Greek “eicosa” meaning twenty). It is a straight-chain alkane, meaning all carbons are connected in a continuous chain without branching. Eicosane is commonly found in paraffin wax and is used in various industrial applications.